Coking retort oven



i April 8,1930.

J. VAN ACKEREN COKING RETORT OVEN Filed May 4, `1925 O Sheets-.Sheet 2 SECTIDN C' April 8, 1930. J. VAN CKEREN comm RETORT OVEN Filed may 4, 17923 10 sheets-sheet l April 8, 193o- J. VAN AckERE-N 1,754,131

l Y GOKING RETORT OVENA Filed Mav 4, 1923 l0 Shge'ts-Shee't 5 siam-lun D-D SECTmN B45 -5 wmw.

April 8, 1930. J. VAN AcKx-:REN I 13754131 COKING RETORT OVENF Filed May 4. 1,923 10 sheets-sheet 4 ...nvm zniumm 10 .Sheetsf-Sheet 5 1 .....W ,.H.. .1..1 wNw....w-... ..M H -1 Uw....m @I .I

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. 1 l l 1 1 1 x 1 1 1 l r l k l 1 n l1 J. VAN ACKEREN u COKING HETORT OVEN- Filed May 4.l 1925 1&1 k? imw 1 M Wwwnb .l/g

April, s, 1930.

April s, 1930.

.mVAN ACKEREN COKING RETORT OVEN Filed May 4, 192s- 1.0 sheets-'sheet 8 Jawa/V42 -12 u mi,

p l I April s, 1930.

. J. `vAN= ACKEREN coxmG RETORT OVEN April ls, 1930. Y

Filed May 4, 192s 10 Sheets-Sheet l0 lmatented ittpr., d, ldd@ MSNM i orifice JI'OSIIEPI-I VAN ACKEREN, 03E' lET'lSB'UlRG-lt, PENNSYLVLNA, ASSIGNUJR, TO THE KUPPER COMPANY, F PITTSBURGH, IPENNSYLVANZIEA., A. CUERPORATIIUN 01.7' PENNSYLVANlU-h i COMING RETOlEt/T OVEN Application led May 4,1933. Serial No. 636,533

be operated as a combination oven, and yet has the regenerators reduced to about one-halt the number shown in the Becker patent. Important characteristics of the invention are: the elimination of any supporting Walls other than the usual pillar Walls located, according to the present embodiment, beneath the colring chambers; the making of the regenerators Wider but also'lovver, permitting a Workn'ian to Walk into a regenerator chamber and thereby greatly facilitating repairs and i replacements, and also permitting the heating Walls and the coking chambers above the regencrators to be made of relatively great height, but with va relatively small increase in the height ot' the battery structure as a Whole; a reduction amounting to-approximately onehalt' of the flow boxes and reversing devices required for controlling and reversing the flow of the various gases through the regenerators and lines; and, as a further feature, the provision ot a duct construction that insures instant admixture of the gas and air, when employing for fuel an extraneously derived gas such as producer gas, A furtherA improvement provided by the invention consists in a novel construction and arrangement ot the expansion joints in the heating Wall and and oven chamber substructure. llt`he expansion joint construction avoids short circuiting between the coke oven gas ducts and the regenerator ducts, avoids leakages trom any of the ducts, or mixing of gases which must be kept separate, and yet permits expansion of the entire heating` Wall and oven chamber substructure, together With the supporting pillar Walls, Without enforcing displacement of the heating Wall structure to an extent suiicient to bring about substantial irregularities in the oven chamber and heating Wall dimensions.

The cross-over duct construction permits the employment 'oit a plurality ot horizontal dues in each heating Wall, instead ot the usual single horizontal Hue which extends from end to end oit the heating Wall. ln', a heating Wall provided with a plurality ot separate horizontal flues, each horizontal Hue need communicatewth only part, in the present instance only about one-fifth, ot the total number of flame tlues. By this construction, there is brought about a proportionate reduction in the volume ot HOW Which must be maintained through the horizontal flue, and a resultant decrease in the size of the horizontal iue. This reduction in sizeof the horizontal tlues has the important advantage that it fenables a considerable thickening `and strengthening of the Walls of the oven structure in the region ofthe horizontal lues. Moreover, the improvedA tiue construction permits an increase in the height of the name tlues, with a corresponding increase in the height of the coking chambers so that the latter may be made narrower in Width, a development greatly facilitating the coking of high volatile coals, and yet the increased volume of combustion products are taken care of, Without making it necessary to enlarge the horizontal flue dimensions to sizes inconsistent with adequate strength of the Wall construction in the horizontal iue region.

The flue construction of the invention is furthermore of great importance in oven batteries fired with eXtraneously-derived gas, such as producer gas, which results in an increased volume of combustion products, for the reason that adequate flue spacesl must be provided to collect and feed to the down-HOW operating flame flues this increased volume. The invention provides adequate accommodation to such increased volume of combustion products, Without introducing elements of Weakness into the Wall structure.V

In 4addition to the objects recited above, the invention comprehends a novel'regenerator construction and system of flow therethrough and through the lines, promoting uniformity of distribution and effectively separating and isolating iniiow regenerators from outiow regenerators and checking leakages of the inflow gases through the separating walls into the lower-pressure outflow gases that exert suction on any crevices through such walls, and has for other objects such other improvements or advantages in. construction and operation as are found 'to obtain in the structures and devices improvements of the present invention, the

view being taken longitudinally through a'l heating wall and a pair of connected regenerators in planes indicated by the line A--A of Fig. 3

Fig.,2 is a crosswise vertical section taken longitudinally through a colnng chamber 1n planes lindicated by the line C-C of Fig. 3;

Fig. 3 is a composite vertical sectional elevation taken longitudinally 'of a coke oven battery, in planes indicated by the lines D-D and B--B of Fig. 1; 1

Fig. .4 is a horizontal section taken 1n' the plane indicated by the line G-G of Fig. 3;

Fig. 5 is a horizontal section taken in a plane indicated by the line H -H of Flg. 3; Fig. 6 is a horizontal section taken 1n a l plane indicated by the line K--K of Fig. 3;

Fig. 7 isan enlarged vertical section taken longitudinall of the battery structure and showing the uct connections between the regenerators and flues; u

Fig. 8 is an enlarged vertical section through such duct connection taken crosswise of the battery structure;

Fig. is a fragmentary plan view of the structure in the bottom of a flue; L

Fig. 10 is an enlarged fragmentary vertical section taken longitudinally of the battery in planes indicated by the line10-10 of Fig. 11, illustrating in further detail the duct connections- .between regenerators and lues and between coke-oven gas ducts and fines, and also illustrating an arrangement of the improved expansion joint construction;

Fig. 11 is a vertical section taken cross-wise of the battery vtaken in planes indicated by the line' 11-11 of Fig. 10;

Fig. 12 is a horizontal section through the heating walls'taken in a plane indicated by the line 12-12 of Fig. 10.; and,-

Fig. 13 is a longitudinal vertical section on a reduced scale of the structure illustrated in Figures 10 to 12 inclusive.

Fig. 14 is a perspective view of the structure shown in enlarged section in Fig. 10, and on the same scale.

The same characters of reference indicate the same parts throughout the several views.

In the embodiment illustrated in the drawings, the invention is incorporated in a combination coke even battery, i. e., a battery hav- -may be applied to other structures, for eX- ample, toordinary so-called coke ovens fired with coke oven gas,'or ordinary socalled gas ovens fired withA producer gas;l hence,the invention is not confined in its scope, except as hereinafter claimed, to the combination oven, nor to the speciiic use and specific embodiment herein described as an illustrative example.

The by-product coke oven battery shown in the drawings includes the structural feature of a plurality of crosswisel elongated spaced heating walls 11, 11, which provide intermediate crosswise elongated colring cham bers or retorts 12, 12 of the horizontal chamberoven type. Pillar walls 13, 13 extend crosswise of the battery and according to the present embodiment of the invention, are located respectively, directly beneath the coking chambers. -These .pillar walls collectively form the main support for the entire su erstructure of' the battery and are themse ves supported upon a iat mat or platform which constitutes the sub-foundation on which the' entire battery rests.

The coal to be coked is -charged into the coking-chambers 12 through charging holes 14 located in the top 15 of the battery and positioned directly above the respective coking chambers as shown in Fig. 2. These charging holes 14 are 'equipped with the usual removable covers for closing the tops of the cokingvchambers, during the coking or distilling of the.coal. The evolved gases and distillation products discharge from the tops 4of the respective coking chambers 12 through gas outlets 16 and thencethrough ascension pipes (not shown) into the usual gas collecting main, through which the gases and `distillation products pass to" the by-product recovery apparatus.

Heat for coking the charges of coal in the several coking chambers 12 is derived from the crosswise heating walls 11, which form the side walls of the coking chambers. Each heating wall 11 is provided with vertical llame or combustion flues 17.. As in the same direction, for example, as Vindow or' burning heating walls, and the intermediate pairs M that operate concurrently for flow in the direction opposite vto the pairs li, for example, as outdow heating walls. With regard to the transverse How duct connections employed in accordance with the cross-over How principle, as hereinafter explained, the heating walls may be grouped into pairs N,

' taken seriatim, each pair hl being constituted of one heating wall of a pair lL and one connected heating wall of the adjacent pair M. With this arrangement, the colring chambers may be, for convenience, grouped into two series, a series of alternate colring chambers C and a series of intermediate coking chambers C. ln any individual coking chamber of the alternate series C, the charge of coal is subjected to heat from both sides and from end -to end of the charge during alternatev reversal periods, while, during the other re versal periods, waste gas Hows lthrough the heating walls on both sides of and from end to end of the charge. In the coking chambers of the intermediate series C', the charge is subjected to the heating edect of the burn ing flame dues, applied ,to vthe full length of one side of said charge, and, then, during a successive reversal period, the heating effect ofthe burnin iiame iiues is applied tothe full length oflliut from the other side of the charge. It will thus be seen that the adjacent heating walls of two cross-connected pairs in turn constitute simultaneously similarly operating pairs of heating walls.

The crosswise regenerators 18 of the retort oven or battery are located at a lower level than the heating walls 11 and coking chambers 12, and, in the present instance, extend in parallelism between the pillar walls 13.` Located in the middle lengthwise vertical plane of the battery, is a vertical partition 19, as shown in Fig. 1, which partition extends from the mat of the battery to the bottom of the overlying colri'ng chamber and interconnects the pillar walls 13. The regenerators, which are respectively located on opposite sides of the battery, extend inwardly to the partition 19 and are separated thereby, as clearly'sho-wn in Fig. 1. This arrangement permits control .from opposite sides of the battery of the flow through the regenerators, thereby assisting the novel Hue arrangement -in promoting uniformity of distribution.

Each regenerator 18 is a chamber contain ing the checker brick 20, with distributing sole channels 21 underneath and communicating with the checker-work. I

ln accordance with the invention, the regenerators are Aeach equal in width tothe horizontal dimensions between adjacent pillar walls 13so that each regencrator is someu what wider than the heating wall. yThis widening of the regenerators permits a corresponding decrease in their height, and so allows the coking chambers andheating walls to be built' as high as elficient operation and quantity production demand, without an .unusual increase in the' height of the battery structure. Moreover, the regenerators, being exceedingly capacious horizontally, permit a workman to walk through them without diiculty, thereby greatly facilitating repairs and replacements. 'y

During alternate outflow reversal periods, the regenerators are heated by the hot combustion products from the flame fiues and,

Vduring the other inflow reversal periods, the I heat so stored in the regenerators is imparted to the medium, which passes through the regenerators into the flame dues. According to the invention, the several regenerators, taken longitudinallyV of 'the battery, are

v,grouped into the alternatepairs R corresponding with and operating for How in the same direction as the alternate pairsV L of heating walls, and into intermediate pairs S of regenerators corresponding with and operatingior flow in the same direction as the intermediate pairs M of heating walls. `When the regenerators R and heating walls L operate for inflow, the heating walls M and regenerators S operate for outflow. On reversal of the battery, the inflow regenerators and heating walls are switched to outflow operation, and the outflow heating walls switched to inflow opand regenerators are eration. A

Each regenerator 1s provided with a series of ducts 23 which respectively lead into forks i 203, one branch 204 of which leads into one heating wall of the pair corresponding to the regenerator, Aand the other-branch 205 of which leads into the otherl heating wall of the same pair. l naemlich-"as, taken longitudinally of the battery, a pair of regenerators corresponds to each pair Lor M ci heating walls, and each regenerator is connected by the forked duct means above described with the fines of both heating walls of the pair, it follows that the flues of each heating wall have duct connections withtwo separate regenerators. This construction makes it unnecessary to provide a pair of regenerators for each individual. heating wall, thus `permitting `the wide regenerator structure hereinbefore referred to. 1

Vln a form of the invention illustrated in Fig. 7, there is provided in the refractory structure above the branching point of each fork 203, a socket or recess 207 having the oppositely downwardly diverging sides 208 with rounded corners 209. As the gas or air passes upwardly from the duct 23, it will enter the socket 207 and be deflected down the diverging sides 208 and around the corners 209, in two equally distributed streams,

`with a relatively rich gas, such as coke oven gas, or with a preheated relatively lean extraneously derived gas, such as producer gas, accordingto the combination oven principle. although the number of regenerators and their attendant flow boxes and reversing-fdcvices have been reduced in number approximately one-half. By this considerable reduction in number of the flow boxes 'and reversing devices, an important savingpis effected, not only in respect of the cost of installation, but also in the operating expense.

As shown in Figs. 1 and l1', the upper ends of the fork branches 204 or 205 leading from separate regenerators into the flues of the same heating wall incline toward each other. This construction is attained preferably by plugs 206 having inclined sides, the plugs being positioned in the flow spaces at the bottoms of the respective flues and being arranged in pairs in the flues to give the converging inclination to the duct branches from separate regenerators. As shown in Figs. 8 and 9, the plugs 206 are held in place merely by their projecting portions 2081 resting on the opposite inclined edges 2091 at the bottom of the flue; thus the plugs 206 are readily removable, if it be desired to increase the capacity of the flow ducts between regenerators and flues. The converging inclination of the ducts 204 or 205 insures instant admixing of the fuel gas and air and consequent immediate ignition in the extreme bottom of the fiue, inasmuch as one ductbranch leads, when the battery is fired with producer gas, from an air regenerator and the other duct branch from a separate fuel gas regenerator.

Each flame flue 17 of each heating wall has at its top a port or opening 24 for draft and the passage of combustion products or waste gases. These ports 24 connect the flame flues 17 with the horizontal or bus flues 25 located in the heating walls above the flames and connecting together the latter in groups. There.

that necessary in present practice and conse-.

quently the cross-sectional area of each horizontalflue 25 may be materially reduced proportionately with the reduced number of connected flame fines, with the result that the thickness and strength of the heating walls are substantially increased in the region of the horizontal flues. Moreover, because of the fact that the necessity for redistribution of the flow between horizontal fines-and flame fiues is confined to a reduced number of flame fiues, in the present instance only about one- `fifth of the total number of flame flues in a heating wall, uniformity in distribution of the flow between flame fluesand regenerators throughout the battery is greatly promoted.

In accordance with the Becker cross-over principle, the respective horizontal flues 25 of each heating wall are communicably connected individually by means of cross connecting passageways or ducts 26 with the corresponding horizontal flues of one of the next adjacent heating walls. These channels 26 are preferably connected to the horizontal fiu'es 25 at approximately the middle portions of the latter, as shown in Fig. l, and extend longitudinallyof ,the oven battery, as shown in Fig. 2. Thus all the flame flues of a heating wall are connected by these ducts 26 `across the intervening coking chamber with .group of flame flues of a heating wall pass over and flow downwardly in the corresponding connected group of fiame flues of vthe adjacent heating wall.

Extending crosswise of the battery in each pillar wall 13 and located beneath the heating wall 11, is a pair of endwise positioned coke oven or relatively rich gas-supply channels29 and 30. These channels respectively communicate by gas ducts 31 with the several flame flues on the opposite sides of the central longitudinal plane ofthe battery. Within the several ducts are located the usual nozzle's 32. The supply, of coke oven gas to the respective channels 29 and 30 may be derived from coke oven gas mains ofthe usual type -gas to the channels29 and 30, as required by battery operation.

When firing the battery with extraneouslyderived lean gas, such as producer gas, all the gas channels 29 and 30 are cut off from the coke oven gas supply. Assuming that the alternate pairs R and L of regenerators and connected heating walls are operating for inflow and that the intermediate pairs M and S of heating walls and regenerators are operating for outflow, a supply of producer gas is permitted to flow into one regenerator P of each alternate pair R. Passing through said regenerators P, the producer gas is preheated before being delivered into the burning flame flues. During 'the inflow of producer gas through such regenerators P, inflow of air is maintained in the other regendelivered thereto by the regenerators P. vDuring the inflow through the regenerators -llt and the connected flues ot the heating walls L, the waste gas from the outflow operating flues of the intermediate pairs M is flowing out through both regcnerators of the connected intermediate pairs S, so that aid regenerators S operate as waste gas regenerators lV. On reversal of the flow, the inflow operatiii g regenerators heroine outflow regen erators and concurrently the outflow operating regenerators become inflow rcgenerators.

The enlarged views in the drawings, particularly Figs. 10 and 7, show that the pillar walls 13 between inflow regenerator pairs lt and outflow regenerator pairs S (but not the alternate pillar walls 13 between the two regenerators of each such pair) have in ltheir masonry horizontal vent passages 108 that extend lengthwise of such walls and branch into vertical passages 100 extending down .in said walls. These vent passages are similai' to vent passages that commonly penetrate the end abutments of colte oven batteries for cooling purposes (for example, as

shown in Figs. ffl, l and 5 of my Patent 1,312,-

372l; but here serve a different purpose. These passages 10S-d0() interrupt pressure differentials that might exist through any crevices from the inflow gas side to the lower pressure outflow waste-gas side of such regenera-tor walls and that. would tend to suck 'gas from the inflow rgenerators into the adjacent wastesgas regenerators. Such vent vpassages within the masonry of the pillar walls that separate the inflow from the outflow regenerators operate in effect (like a break in a siphon) to break the low-pressure or vacuum line that would be established, and progressivelyY become aggravated, through joints that may be opened or crevices that may he formed by the expansion or contraction or settling of the pillar walls and that may penetrate from the inflow regenerators through to the low-pressure or suction eondi tion necessarily present in the adjacent outflow'regenerators and so cause loss of gas from the inflow regenei'atorsl and .also the jeopardy of mixingfuel-gas with the surplus air carried along in the waste-gas that is outflowing down through the highly heated outflow regenerator chambers. As the drawings show, suchvent passages are not present or needed in the alternate pillar walls 13 that are between two'inflow regenerators; because there is little or no pressure diderentialbctween theseregenerators, which flow in the .same direction and are equally distant from the stack-draft; whereas an outflow regenerator is much nearer the stack than 1s an adjoining inflow regenerator, and so in much lower pressure or suction condition. The pillar walls 13 that do have the vent passages 10S-109 are those that integrally bear and continue upward into the masonry units 106 (Fig. 10, or 106, Fig. 7) that laterally face on either side the expansion joints 102 (Fig. 10, or 11, Fig. 7), effectively separating the gas-duct-carrying masonry units 104k105 on the one side, 'of each such unit 106, from the units' 10a- 105 on the other side of it, the units on such opposite sides operating concurrently for inflow gases and outflow gases, iespectively,"in correspondence with theinflow and outflow -regenerators with which their ducts connect. And thus each vented pillar wall 13 with its integrally surinounting masonry unit 106 (or 1061) flanked by the expansion joints 102 (or 411) forms all the way up to the flame-flues an effective isolation of the inflowing gases on the one side from the outflowing waste-gases on the other side, as to the adjoining counterflowing regenerators and as to the corresponding gasducts above them. And the coking-chamber itself that is directly above said unit 106, on the vented pillar wall 13, separates the upburning flame-fines on its one side from the down-flowing waste-gasfilled flame-flues on its opposite side, and so completes the isolation of the upwardly inflowing gases from the adjacent lower-pressure downwardly countterflowing waste-gases, on the respectively opposite sides ofeach crossover flow-path in the battery.

In operating' the battery with coke oven gas, the supply of producer gas to regenerators P is shut off and air is permitted to flow into such regeneratorsin place ofthe producer During coke oven gas operation, a supply of coke oven gas is maintained in the channels 29 and 30 which feed the upburning flues. rll`lie reversing mechanism is operated at each reversal to place all of the inflow operating regenerators in communication with the'outer air and concurrently all of the out flow operating regenerators in communica tion with the exhaust.

' Vin arrangement of the improved expansion joint construction is illustrated in Figs. 10 and 13. As shown in said figures, the exparisien joints in the structure 101 between the top level of the regenerators and the 'base of the heating walls 11 are so arranged that separate units of expansion are provided in this structure, whereby adequate Aexpansion isy permitted, without any danger of enforcing displacement of the heating wall structure to an extent sufficient to bring about substantial irregularities in the oven chain- Vber and heating wall dimensions, or the octhe feed ducts 23; vertical expansion joints walls which do not carry-.the 'regenerator" ducts. Moreover, expansion joints 107 are also provided between the bases of the heating walls 11 and the top of the structure 101. All of said expansion joints hereinbefore described are staggered either vertically or horizontally as may be necessary to avoid leak-v ages from gas flow channels or ducts. The improved construction and arrangement of the expansion joints permits the entire structure below the bases of the heating walls to expand, as required', and yet avoids leakages and substantial displacement of any of the heating walls.

. As shown in Figs. 3 and 7, the expansion joints 41 of the heating wall and oven chamber substructure 42 are located only above the intermediate pillar walls 13 which are between the pairs: R, S of regenerators, there being no expansion joints above the alternate pillar walls that are located between the two regenerators of lany pair R or S. With this construction, expansion joints are avoided in those illar walls that have the duct connections etween the pairs of regenerators and l vthe pairs of simultaneously-operating -ued heating walls. Thus the alternate pillar walls and the pairs of heating walls connected with regenerators through the ducts 23 may expand or contract as av unitary structure,

without any danger whatever of mixing gases in a region where it is of prime importance,

especially during'the infiow,to keep the gases separated. l

The invention as hereinabove set forth is embodied in a particular form of construction but may be variously embodied within.

the scope of the claims hereinafter made.

I claim: v i f 1. In a coke oven battery,'in combination: a series of alternate horizontal coking chambers and heating walls therefor arranged laterally of eachother, each of said heating walls comprising-vertical combustion'ilues; a plurality of horizontal flues in each of said heatin vwalls and resepectively connecting a plurality of the combustion flues of their respective heating walls; the horizontal. ilues being also communicably connected with the horizontal flues of one of the adjacent heating walls so that the heating walls are operatively connected in pairs; and a series of `crosswise regenerators, each as wide as but not as great in vertical dimensions as each of said' heating walls, the regenerators being groupedfm parallel inpairs of contiguous regenerators, with the alternate pairs operable 1n alternation with the intermediate pairs for inflow and outflow, each regenerator being connectedv by forked duct means with combustion flues of both of two adjacent heating walls comprising one heating lwall of each of two of the connected pairs thereof, and each of the combustion flues in each of the heating walls having fiow connection by said forked duct means with a pair of said regenerators adapted to operate in parallel with each other for gas flow simultaneously in the same direction, each of the pairs of regenerators when operable for inflow being ointly operable for conveying air to the fines or separately operable for conveying air and an extraneously derived gas ;4 substantially as specified.

heating-'walls and respectively connecting a plurality of the combustion fiues of their respective heating walls; the horizontal fluesI beingA also communicably connected over one of said cokin'g chambers with the horizontal fines of one-of the adjacent heating walls, so

that the heating walls are operatively connected in pairs; and a series of cross-wise regenerators, the regenerators being grouped in parallel into pairs of contiguous regenerators, with the alternate pairs operable in alternation with the intermediate pairs for inflow and outflow, each regenerator being connected by a forked duct means with combustion iues of both of two adjacent heating walls comprising one heating wall of each of two of the connected pairs thereof, and each of the combustion lues in each of the heating walls having fiow connection by said forked duct means with a pair of regenerators adapt-ed to operate in parallel with each other for gasl fiow simultaneously in the same direction, each of the pairs of regenerators when operable for inflow being jointly operable for conveying air to ,the flues or separately operable for conveying air andan extraneously derived gas; substantially as specified.y

3. In a coke oven battery, in combination:

a series of alternate horizontal coking chambers and heating walls therefor arranged laterally of each other, each of vsaid heating walls comprising vertical combustiontflues; a plurality of horizontal flues in each of said heating walls and respectively connecting a plurali-ty -of the combustion fiues of their re speetive heatingv` walls; the horizontal flues being also communicably connected with the 1' horizontal flues ofone of the adjacent heating walls, so that the heating walls are operatively connected in pairs; and a series of crosswise regenerators, each as wide as bnt not as great m vertical dimensions as each of said heating waaier walls, the regeneratorsbeing. grouped in parallel into pairs of contiguous regenerators, with the alternate pairs operable in alternation with the intermediate pairs for inflow and outflow, each regenerator being connected by a forked duct means'withcombustion fines of both of two adjacent heatine walls comprisingl one heating wall of each or two of the connected pairs thereof, and each of the combustion llues in each of the heating walls having flow connection by said forked duct. means with a pair of regenerators adapted to operate in parallel with each other for 'gas flow simultaneously in the same direction.

it. In a cokeoven battery, in combination: a series of alternate horizontal coking chambers and heating1 walls therefor arranged laterally of each other, each of said heating walls comprising vertical combustion flues; a plurality of horizontal flues in each of said heating walls and respectively connecting a plurality of the combustion flues of their respective heating walls; the horizontal iiu'es being also eoininunicably connected over one of said coking` chambers with the horizontal fines of one of the adjacent heating walls, so that the heating walls are operatively connected in pairs; and a serieslof cross-wise regenerators, the i'egenerators being grouped in parallel into pairs of contiguous regenerators, with the alternate pairs operable in altei-nation withthe intermediate pairs for inflow and outflow, each regenerator being tid connected by a forked ductimeans with coinbustion fines of both of two adjacent heating walls comprising one heating wall of each of two of the connected pairs thereof, and each of the combustion iues in each ot the heating walls having flow connection by said forked duct means with a. pair of regenerators adapted to operate in parallel with each other for gas flow simultaneuslyvin the same direction.

5. A coke oven battery having side-by-side coking1 chambers with intern'iediate flued heating walls and reversible regcnerators serving said walls., characterized by the heat-- ing walls being operatively connected in pairs by duct means extending transversely over an intervening` coking chamber andcommunieating with the flues of two ofthe heating walls that are on opposite sides of the coking chamber and by each regenerator being connected by forked duct means with combustion flues of both of two adjacent heating walls comprising olie heating wall of each of two of the connected pairs thereof, and by each of the combustion flues in eachof the heating walls having dow connection by said forked duct means with a pair of regenerators adapted to operate in parallel with each other for gas flow simultaneously in the same direction` 6. A coke oven battery having side-by-side coking; 'chambers with intermediate Hued ing walls being'operatively connected impairs by duct means extending transversely over an intervening coking chamber and communicating with the flues of two of the heating walls that are on opposite sides of the coking chamber and by each rgenerator being corrv nected with combustion fines of both of two adjacent heating walls comprising one heating wall of each of two of the connected pairs thereof and by each of the combustion flues in each of the heating walls having flow connection with a pair of regenerators adapted to operate in parallel with each other for gas flow simultaneously in the saine direction.

7. A coke oven battery having side-by-side coking thambers with .intermediate flued heatingv walls, characterized by the heating walls being operatively connected in pairs by duct means extending transversely over4 l) an intervening eokmg chamber and communicating with the tlues of two of the heatingwalls that are on opposite sides of the 4coking chamber and by each regenerator being connected with combustion dues of both of two adjacent heating walls comprising one heating wall of each of two of the connected pairs thereof, and by each of the combustion flues in each of the heating walls having flow con nection with a pair of regenerators adapted to operate in parallel with each other for gas flow simultaneously in the same direction, each of the pairs of regenerators when op erable for inflow being jointly operable for conveying air to the tlues or separately oper able for conveying air and an eirtraneously derived gas; substantially as specified.

8. ln a coke oven battery, in combination: a series of alternate coking chambers and heating walls therefor arranged laterally of each other, each of said heating wallsrcoin prising combustion flues, the flues` of each of said heating walls being communieably connected witlrthe tiues of one of the adjacent heatingswalls, so that the heating walls are operatively connected in pairs; and a series of regenerators, each as wide as but not as great in vertical dimensions as reaeh of-said heatin g walls, the regen eratorsbeing grouped in parallel into pairs of contiguous reeenerators, with the alternate pairs operable 1n alternation with the intermediate pairs for inflow and outflow, each regenerator being connected by a forked duct means with coinbustion flues of both of two adjacent heating walls comprising one heating wall of each of two of the connected pairs thereof, and each of the combustion flues in .each of the heating walls having flow connection by said forked duct means with a pair of regenerators adapted to operate inA parallel with each other for gas flow simultaneously in the same direction, each of the pairs of regenerthe Hues of one of the adjacent heating walls,

so that the `heating walls are operatively connected in pairs; and a series of regenerators, the regenerators being grouped in parallel into pairs of contiguous regenerators, with the alternate pairs operable in alternation with the intermediate pairs for inflow and outflow, each regenerator being connected with combustion flues of both of two adjacent heating vwalls comprising one heating wall of each of two of the connected pairs thereof, and each of the combustion fines in I each of the heating walls having flow connection with a pair of regenerators adapted to operate in parallel with each other for gas flow simultaneously i`n the same direction.

10. In a coke oven battery, in combination: a series of alternate coking'ch anibers and heat- `in walls therefor arranged laterally of each -ot er, each of said heating walls comprising combustion flue means, the flue means of each f .said heating walls being communicably y connected with the flue means of one of the adjacent heating walls, so that the heating walls are operatively connected in pairs;and

,a Series of regenerators, each as wide as but not as great in vertical dimensions as each of said heating wallsf the regenerators being grouped in parallel into pairs of vcontiguousV regenerators with the alternate pairs operable in alternation with the intermediate -pairs for inflow and outflow, each regenerator' being connected with combustion flue means of both of two adjacent heating walls comprising one heating wall of each of two of the connected pairs thereof, and each of the combustion flue means in each of the heating vwalls having yflowconnection with a pair of regenerators adapted to operate in parallel .with each other for gas flow simultaneously in the same direction.- l o 1l. In a coke oven battery, in combination: a series of alternate coking chambers and heating walls therefor arranged laterally of each other, each of said heating walls comprising combustion ues all of which are communicably connected over one of said coking chambers with the flues of one of the adjacent heating walls, so that the heating walls are operatiyely connected in'pairs; and a series of ,regenerators, the regenerators being grouped in parallel into pairs ofcontiguous.

regeneratorsfwith the alternate pairs oper- -able in alternation with the intermediate pairs for inflow and outflow, each regenerator being communicably connected by a forked duct means with combustion llues of both of two adjacent heating walls comprising one heating-wall of each of two of the connected pairs thereof, and each of the combustion flues in each ofthe heating walls having flow connectionby said forkedduct means with a pair of regenerators adapted to operate in parallel with each other for gas flow simultaneously in the same direction.

12. In a coke oven battery, in combination: a series vof alternate coking chambers and heating walls therefor arranged laterally of each other, each of said heating walls comprising combustion liues all of which are com- -municably connected over one of said coking chambers with the flues of one of the adjacent heating walls, so that the heating walls are operatively connected in pairs; and a series of regenerators, the regenerators belng grouped 1n parallel into pairs of contiguous regenerators, with the alternate pairs operable in alternation with the intermediate pairs for inflow and outflow, each regenerator being connected with combustion flues of both of two adjacent heating walls comprising one heating wall of each of two of the connected pairs thereof, and each of the combustion flues in each of the heating walls having fiow connection with a pair of regenerators adapted to operate in parallel with each other for gas flow simultaneously in the same direction, each of the pairs of regenerators when operable for `inflow being jointly operable for conveying air to the lues or separately operable for conveying air and an extraneously derived gas.

' 13. In a coke oven battery having side-byside coking chambers with intermediate flued heating walls grouped into simultaneously similarly operable pairs, pillar walls'directly beneath each of the coking chambers and parallel with the heating walls, and regenerators beneath the heating walls and disposed in pairs each pair'comprising two contiguous regenerators disposed on opposite sides respectively of a pillarwall directly under one of the coking chambers that is between the two heating walls of a simultaneously similarly operable pair, and having the regenerators of each of'the pairs con-l nected with the flues of both of the heating walls of the simultaneously similarly operable pair on oppositesides of a coking chamber directly abovethe pillar wall between the two regeneratorsof the 4pair by. duct means extended out from each regenerator of the pair through the pillar wall and heating wall substructure between the two heating Walls of the pair, the improvement characterized by expansion joints located in the substructure between the bases of the heating walls and the top level of the regenerators, said eX- pansion joints being arranged in pairs above lli each pillar wall and with the joint of the pairs above each of the pillar walls through which the regenerator ducts extend disposed between the regenerator ducts and the contiguous portions of the bases of thev heating walls to which they extend, whereby each of the heating walls and each vof the coking chambers between each two adjacent heating walls may expand or contract as individual units without short-circuiting from one regenerator duct tonnother regenerator duct of gaseous media flowing through the regenerator duct connections between the regenerators and the combustion fines.

14. 1n a coke oven battery having side-byside coking chambers with intermediate flued,

` heating walls, characterized by the heating walls being operatively connected in pairs transversely over an intervening coling chamber and also grouped into simultaneously similarly-operable pairs respectively constituted of one heating wall of` each of two of the connected pairs, i'n combination with pairs of regenerators the members of which respectively serve both heating walls of the simultaneously similarly-operable pairs; substantially as specified.

l5. A coke oven battery having side-by-sidc colring chambers with intermediate flued heating walls, characterized by the heating walls being operatively connected in pairs transversely over an intervening colring chamber and also grouped into simultaneously similarly-operable pairs respectively constituted of one heating wall of each of two bf the connected pairs, in combination with pairs of regenerate-rs located directly beneath the heating walls and the members of which regenerator pairs respectively serve both heating' walls` of the simultaneously similarlyoperable pairs; substantially as specified.

1G. ln a coke oven battery having side-byside coking chambers with intermediate fined heating walls grouped into simultaneously similarly-operable pairs, and pairs of regenerators below the heating walls, the regenerators of a pair being separated by a pillar wall, connected with4 said simultaneously similarly-operable pairs of heating walls by duct means extended out through the pillar wall and heating wall sub-structure, that is, between the two `heating walls of a simultaneously similarly-operable pair, and fuel gas duct means for supplying to the flues fuel gas independently of the regenerators; the improvement characterized by expansion joints locatedin the structure between the bases of the heating walls and the top level of the regenerators, said expansion joints being arranged in pairs above each pillar wall and providing separate expansion units for the regenerator ducts and separate expansion units for the fuel gas duct means, each unit carrying regenerator ducts and each unit carfuel gas duct means being separated by expansion joints from the other parts of the expansible structure;` substantially as specified.

17. Thecombination as'defined by claim 5, having the two sets of ducts of a pair of regenerators co-aXially arranged with respect to an axis extending transversely of the battery; substantially as specified.

18. In a coke oven battery having coking chambers, intermediate flued heating walls, pillar walls below the coking chambers and heating avalls and parallel with the heating walls for supporting the Coking chambers and heating walls. regenerators between the pillar walls coinmunicably connected with the flues of said heating walls by duct means extending to the flues of two heating walls on opposite sides of an intervening coking chamber through both the coking` chamber substructure and through the portions of the substructure of the respective heating walls adjacent the substructure of the coling chamber intervening said two heating walls, the improvement characterized by expansion joints separating the substructure under one of the coking chambers and a portion of each of the substructures under the two heating walls of opposite sides of and contiguous to the colring chamber that jointly carry said duct means for the fines of said two heating walls on opposite sides of said chamber from the remaining portions of the substructure of said two heating walls whereby the several portions of the coking chamber and heating wall substructures may expand and contract as individual unitary structures without short-circuiting from one regenerator duct to another of gaseous media flowing through the regenerator duct connections between the regenerators and the fines of said twoheating walls.

19. rlhe combination defined in claim 18, and in which the pillar walls for supporting the coking chambers and heating walls are located directly under coking chambers, and in which each of the regenerator ducts that extend through the coking chamber substructure passes through the tops of said pillar walls to the flues of both of the heating walls on opposite sides of the coking chamber above the respective pillar walls.

Q0. In a colte oven battery in combination: coking chambers; intermediate flued heating walls communicably connected into consecutive pairs with each other by duct means extending over an intervening coking chamber between said heating walls and communieating with the flues of two of the heating walls that are on opposite sides of the coking chamber and connecting means for supplying air and gas to the flues of the latter and removing waste gas therefrom; said connecting means beingoperable to cause the flow of gas in consecutive pairs of heating walls to be clockwise in one pair and simullll) till

cent pairs of heating walls; and regenerators for preheating the air and gas and for conveying off the waste gases, respectively, each regenerator being in communication with the iiues of two adjacent heating walls of two of the adjacent pairs of heating walls.

21. In acoke oven battery, in combination: j

coking chambers; intermediate flue'd heating walls communicably connected into pairs with each other by duct means extending over an intervening coking chamber betweenjsa'id heating walls and communicating witli'tlie flues of two of the heating walls that are 4on opposite sides of the coking ch amber;- fregenerator connecting means for' suppl ing air and gas to the fines of said walls an`J- removing waste gas therefrom.; the connections being operable to cause some of the coking ehambers to be heated by iame on both'lsides simultaneously while other coking chambers are heated by flame on one side and by waste gas on the opposite side and means for reversing thel f'low of the gases; and air and gas regenerators that are each in communication through said connecting means with the ilues on both of the -opposite sides of a coking chamber; substantially as specified. A

22.' A coke oven battery havingside-byside coking chambers with .intermediate fiued heating walls and regenerators serving said walls, characterized by the flues of the heating walls being operatively connected in groups transversely over intervening coking chambers and by each re enerator being con'- nected with combustion ues of eachvof a plurality lof adjacent heating fwalls com rising one eating wall of each'of a plura it of the connected groups thereof, and by eac of the combustion flues in each of the heating walls having flow connection with a plurality of regenerators adapted to operate in `parallel with each other for gas flowsimultaneously in the same direction; substantially as specified.

28. The combination as defined by claim7 22, in which the regenerators are arranged crosswise of the battery; substantially as specified.

24. In a coke oven battery, in combination: coking chambers; intermediateued heatin walls c'ommunicably connected with eac other over one of said coking'chambers between said heating walls and provided with substantially parallel sets of combustion lues; regenerators for delivering pre-heated air and fuel gas and for removing waste gas from said flues, a fuel gas regenerator being connected to feed the gas to two consecutive',

sets of flues respectively on opposite sides of.

one of the coking chambers to effectthe flow of all of the gas in the corresponding heating walls in the same direction.-

25. A ,coke oven battery having side-by-I heating walls and reversible regenerators serving said walls, characterized by the heating walls being operatively connected in4 pairs across an intervening coking chamber so that all lowrmay be upward in one wall "and downward inthe other wall of each pair during each reversal period and by each regenerator being connectedwith the iues of one heating wall of each of two of the connected pairs thereof, and by each of the heating walls having flow connection witha pair of regenerators adapted to o ously in the same direction; substantially as specified. l y

26. In a coking retort oven battery having a row of side-by-side coking chambers .wit intermediate flued heating walls, regenerators Abeneathvsaidcoking chambers and heating walls, duct means extending through the substructure between the regenerators and the coking chambers and communicably connecting the regeneratois with the ilues of the heating walls, and fuel gas duct means in the base substructure of each heatin wall for supplying'to the ilues therein fue gas independently of the regenerators andarranged in alternation lengthwise of said row with the regenerator ducts; the improvement characterized-by expansion joints located in the structure between the bases of the heating walls and the top level of the regenerarate in parl allel .with each other foi` gas ow simultane- 'Iol tors, saidexpansion jointsbeing arranged y 1 therein to provide separate expansion units for the regenerator ducts and separate eX- pansion'units for each of the fuel gas duct means, each unitcarrying regenerator ducts and each unit carrying afuel gas' duct means being separated by expansion joints from the other parts of the expansible structure; substantially as specified..

27,' In a coke oven batteryzhaving sideby-side coking chambers with intermediate heating walls respectively comprising vertical combustion fines, 'horizontal flow .duet means in each heating wall and respectively connecting a plurality of the vertical combustion flues of their respective heating walls at the upper portions of said' combustion ues, the horizontal How duet means in each wall being also communicably connected with the` horizontal flowduct means in an adjacent wall by duct. means extending across yalternate coking 'chambers, pillar walls directly below each of said coking chambers, crosswis'e regenerav,tors between the 'pillar walls and disposed in pairs eachcomprising Vtwo regenerators adapted to operate in parallel for gas fiow simultaneously in the same direction and resp -ee-tvejy disposed on opposite sides of a,

pillar wall below' an intermediate coking chamber, and each regencrator, ofa pair of regenerators respectivelyonop osite sides of a pillar wall below an interine iate coki-ng 

